Slow moving, blinking light moving across the sky vanishing with no cloud cover.

As we were gazing at the sky seated on our back patio enjoy a cigarette, we observed what appeared to be a blinking star. As we were noticing this blinking star we also noticed that it began to move, but not as quickly as an airplane or a shooting star; just kind of gliding across the sky. It continued to blink until it simply vanished on a clear night with no clouds in the sky.